The firewall implements packets filtering and thereby provides security functions that are used to manage data flow to, from, and through the router. Along with the Network Address Translation, it serves for preventing unauthorized access to directly attached networks and the router itself, as well as, a filter for outgoing traffic.
BridgeBOX router features a stateful fireall, which means that it performs stateful packet inspection and keeps track of the state of network connection traveling across it.
It also supports Source and Destination NAT (Network Address Translation), NAT helpers for popular applications and UPnP. And yes we, can fully support lPv6
The Firewall provides features to make use of internal connection, routing and packet marks.